Madonna has voiced her support for President Barack Obama at an 'MDNA' tour date in Washington DC, telling the crowd that his election "means there is hope in this country".

The 'Girl Gone Wild' singer urged fans at the Verizon Centre yesterday (September 24) to vote for Obama so that Abraham Lincoln, Martin Luther King Jr and others who fought for equality "did not die for nothing".

"It is so amazing and incredible to think that we have an African American in the White House," she declared on stage. "Those fine human beings did not die for nothing.

"They fought for our freedom, not just African Americans, but for all people... who are different, unconventional or people who want to believe in what they believe... Y'all better vote for f**king Obama, OK?"